Grate-bar mechanism



H. c. MAUL GRATE BAR MECHANISM Feb- 3,

Filed July 5, 1924 WY 3 v m Elvwculfoz Patented Feb. 3, 1925.

HENRY o. ann. oemnmo-Ir, m-ronrsan,

PANY, or Der-norm, MlflHlGAN,

Assmnon TO THE mro i eansroyn COM- e e 'emaaw eleea pp at n mama. 5, 1 2 ria 1 1 1 19.

To all: whom it may concern.

Be it known that Ll IENnr MAUL, a citizen of the United States, residing at Detroit, in the county of WVayne and State of Michigamha ve invented certain new and useful Improjements in Grate-Bar Mechanisni, of which the following is a spec1fica tion, reference being; ha dthe'rein to the accompanying drawings.

This invention relates to a grate assembly for stoves or furnaces wherein a plurality of rockablefgratebars are provided to which it'i s d esi'rable to limitthe rocking of the bars, except atoertain times when anescessive rocking' c is required to effect the dumping ofj'the' ashes, c'linkers' or fire.

The purpeses of this invention are to provide ian'arrangen ent of parts wherein great facility is obtained for the assembling and disassembling of the grate bars within the stove or furnace, and to further provide for the limiting of' the movement; of the said grate bars when agitated for the shaking downof ashes in the'normalmanner, whilst provision is also made for the release of'the said grate bars to admit of their being moved to a much greater extent when thought necessary or desirable.

' A further objeotof the said: invention is to provide for the combination with a plurality of simultaneously movable rockable grate bars and a surrounding casing of an eXten-. sion or s'h'aft: on one of the bars projecting through the sides of' the casing for the reception of a sha'kerbar or handle, of a. stop operable from the outside of said casing, said= stop normally loosely engaging said shaft to limit its movement andadaptedto be disengagede to permit free movement; a still further object being to effect such control of tlie" movement of the shaft by the use ofla reciprocab l'e stop member adapted to be brought into and out of engagement with a laterally extending abutment on the shaft. Still'further objects subsidiary to and resulting from the aforesaid objects, or from the oonstructionor operation of theinvention as it may be carried into effect will beco eapparen't as the said invention is hereinafter'further described. Ign carrying the's'aid" invention into effect. Iniay provide in a stove or furnace a series of grate bars coupled 'or linked together for simultaneous operation and journaled within a'casing, theforward jpurnali'ng means dental displacement from saidjournal memher, an extended Shaft on one of the,

grate bars projecting through onebf the s1de's of, the casing and having an abutment position secufingsaidtrunnion against thereon normally engaged by a, stopiw ithin the casing, which stop is movable to. a disengaged position by meansexterior to t-he casing, And I may provide a movable section in the casingcontiguous to the said shaft whereby the removal or" said section will free the said shaft so that the grate bars may be freely removed from the 'said casing, upon their release byf the moving or removal of said locking bar. All of which is more particularly described and ascerta-ined hereinafter,by way of'exam ple, agving reference the accomp'anying fl dnawing, in whioh- "1 Figure 1 isa sectional plan of the lower part-of stove embodying the said invention, part ofthe casing being broken away to better illustrate the arrangement of parts;

Figure 2 isa sectional elevation taken on the line 2" X Figure 1;

Figure 3 is an elevation ofthe same, and

Figure 4 is a detail broken perspective View of; stop mechanism.

Similar characters of reference indicate similar drawing. p

A base casting or casing 1 having mounted thereon a fire pot 2 is shown, beneath which fire pot are arranged grate bars 3, 4' and" 5 Parts: in the wami fis 'esof an part ofthe casing illustrating the provided witli trunnions 6,:7 S at oppo- Inassembling the said grate bars the rear trunnions are entered into their siippoi'ting casting and the forward"tmfinigastfitered laterally 1 into the" recess 1 2 of the journal member 10, whi'oh' secured by a locking plate 13 slidable upon lugs 14: on the said member 10, the said locking plate 13 being provided with lugs 15 which cooperate with the lugs 11 in embracing said trunnions whenthe said plate 13 is in its closed position, in which position it is adapted to be secured such as by a setscrew 16.

17 are downwardly depending arms from the forward trunnions of the. grate bar, the said arms being coupled together by a bar or link 18 for simultaneous operation of the said bars, and to effect such operation the center grate bar is shown as. having its trunnion extended forwardly in the form of a shaft through the front of the casing 1 and provided with a squared end 19 for the reception of a suitable shaking tool.

This shaft or extension of the trunnion '7 is provided with a laterally extending lug 20 within the casing which lug is engaged by a stop 21 in the form of a member slid ably mounted in a block 22 within the easing, the said stop having a recess 23 therein of greater width than the lug or abutment 20 whereby the engagement therebetween is loose and permits the shaking of the grate bars to an extent limited by the difference between the width of the said abutment and the recess. The stop 21 is also provided with a handle 24 which extends outwardly through an aperture 25 in the said casing 1, whereby the said stop may be actuated from the exterior of the casing to effect its withdrawal from engagement with theoabutment 20 and to thereby permit the operation of the grate bars to a. much greater extent so that the dumping of the stove or furnace may then be effected.

The front of the said casing 1 is further shown as being provided with a removable section or plate 26 secured in position by a set screw 27. the said casing and plate being provided with co-acting recesses 28 and 29 together forming an opening through which the shaft 7 passes. lhe removal of the said plate 26 releases the said shaft in so far as its relation to the casing is concerned, so that the grate bars may be easily removed upon the withdrawal of the lockin g plate 13 from its locking position on the trunnions of the grate bars as will be read ily understood.

The arrangement suggested is particularly applicable and convenient for stoves and furnaces such as of the type used in the heating of small buildings and admits of the ready renewal of the grate bars when necessary as well as their original assembling in the stove or furnace in the course of construction; and the simple and effective arrangement' of means controlling the movement of the grate bars permits the normal shaking thereof in a definitely determined manner calculated to prevent undue loss of fire or material from the grate, or the fouling of the grate bars by coal or clinkers but permitting when required the thorough dumping of the contents of the fire box of the stove or furnace. V

This invention may be developed within the scope of the appended claims withoutdeparting from the essential features of the said invention, and it is desired that the specification and drawing be read as being merely illustrative and not in a limiting sense, except as necessitated by the prior art.

What I claim is 1. In a stove, ingcombina-tion a casing having a front wall, a plurality of co-acting grate bars mounted in said casing, a shaft extension on one of said bars projecting beyond the front wall of saidcasing, and a stop slidable in a lateral direction against the inner face of the casing front wall normally limiting the rotation of said shaft,

front wall of said casing. 7

2. In a stove, in combination, a casing lraving a front wall,'a plurality of coacting grate bars mounted in said casing with one of' said bars projecting through the casing front wall and a reciprocable stop against the inner face of the casing front said stop having a portion slidable in the wall slidable into loose engagement with a part of said projectinggrate bar to limit oscillation of said grate bar andwhen re tracted permit free rocking of said grate bar.

3. In a stove, in combination, a casing having a front wall, a. plurality of coacting grate bars mounted in said casing, a shaft extension on one of said bars projecting beyond one of the walls of said casing, an

abutment on. said shaft, and a forked stop on one side of the casing front wall and operatable from the opposite side of said casing front wall for engagement with said abutment.

4. In a stove, in combination with a casing, a grate bar assembly comprising a pluralitv of linked rockable bars journaled at the back of said casing, a journal member in the forward part of said casing and adapted to receive said bars by lateral movement of said bars therein, a movable looking plate slidable laterally against said casing for receiving said bars in said journal member, and an operating shaft on one of said bars extending through the front of said casing.

5; The combination according to claim 4. wherein the front of the casing is provided with a removable section contiguous to the shaft whereby the removal of the shaft from the casing is facilitated.

6. Means for supporting a series of rockable grate bars in a furnace casing, said means comprising a rear journal member for the rear ends of the grate hairs, angular lugs for the front ends of said grate bars, a

slidable looking plate, and angular lugs on said slidable looking plate to cooperate with 5 the first mentioned lugs in forming a journal support for the front ends of said grate bars.

7. Grate bar supporting means as called for in claim 6, wherein the first mentioned 10 lugs are on a front ournal member supporting said slidable locking plate, with said rear and front journal members supported from said casing.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY C. MAUL. Witnesses:

JOHN E. RONAN, IDA MENDELL. 

